In close collaboration with Domis and Matic, GPL delivered comprehensive design input and end-to-end manufacturing for over 2,500 bespoke plenum boxes, supporting a range of high-profile residential and commercial developments across Manchester. Each unit was meticulously engineered and fabricated to meet precise site-specific requirements, accommodating complex architectural layouts and HVAC demands. This tailored approach ensured optimal airflow distribution, enhanced energy efficiency, and seamless integration with existing mechanical systems. Our involvement from the early design stages through to final supply helped streamline installation on-site and uphold the performance standards of each development.